Question

A specimen made of ductile material subjected to tensile stress has maximum shear stress on a plane inclined with an axis is

• A. 30°
• B. 45°
• C. 15°
• D. 60°

Answer 1

Answer:

B. 45°

When a ductile material is subjected to tensile stress, the maximum shear stress occurs on a plane inclined at 45 degrees to the load. Ductile materials are weak in shear, and failure primarily occurs due to slip in shear along the planes forming approximately 45-degree angles with the axis of the test specimen. This results in a "cup and cone" fracture.